Hence, the studies of local magnetic anisotropy in powder systems might now become accessible. The magnetically induced preferred crystallite orientation was used to study the local susceptibility of a single-molecule magnet Co ( 2 CS ) 2 Cl 2. Neutron diffraction is a form of elastic scattering where the neutrons exiting the experiment have more or less the same energy as the incident neutrons. Neutron-powder-diffraction study of the nuclear and magnetic structures of YBa 2 Fe 3 O 8 at room temperature, Phys. The values of the magnetic moments in Fe 3 O 4 and the susceptibility tensors of Ho 2 Ti 2 O 7 at various temperatures and fields were found in perfect agreement with these found earlier in single-crystal experiments. The input diffraction data can be unlimitedly combined, the combination of powder neutron data with single crystal X-ray data being a typical example. Many refractory substances and also a number of salts can be charac. We start with a brief description of how powder neutron diffraction experiments are conducted, including some (but not too much) of the underlying physics and math that enable this technique. The SRM is certified with respect to the lattice parameter of the Si substrate. x-ray fluorescence, x-ray diffraction, and neutron activation analyses are sug- gested. Specifically, we will focus on powder neutron diffraction. It consists of 25 mm x 25 mm pieces of a silicon wafer with a Si-Ge epilayer. This is demonstrated by revisiting two test powder compounds, namely, the low anisotropy (soft) ferrimagnetic compound Fe 3 O 4 and the spin-ice compound Ho 2 Ti 2 O 7 with high local anisotropy. The new SRM 2000 is the first thin-film, high-resolution diffraction SRM. ![]() We show that these difficulties can be overcome by using a large area detector in combination with the two-dimensional Rietveld method and powder samples with a magnetically induced preferred crystallite orientation. It is widely used in the studies of single crystals, but it is still hardly applicable to a number of highly interesting powder materials, such as molecular magnets or nanoscale systems because of the low luminosity of existing instruments and the absence of appropriate data analysis software. Polarized neutron diffraction allows one to determine the local susceptibility tensor on the magnetic site both in single crystals and powders.
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